Cita APA (7th ed.)

Babbie, E. (1998). The practice of social research (8th.ed.). Wadsworth.

Cita Chicago (17th ed.)

Babbie, Earl. The Practice of Social Research. 8th.ed. Belmont: Wadsworth, 1998.

Cita MLA (9th ed.)

Babbie, Earl. The Practice of Social Research. 8th.ed. Wadsworth, 1998.